How does a GIF making site from videos work?

Question

JavaScript

Make a one-page site that makes a GIF animation from a video, as in the example TYK

Using Laravel, where to dig, how does it work?

- Take a video
- how does it read it, parse it?
- libraries?
- how to give the opportunity to choose frames for gifs?
- how to pull frames?
- and a bunch of other questions, are there any article resources where you can dig up information on a specific case?

P.S. Google is clear.

Answer 1

Start with this
https://habrahabr.ru/post/171213/